The point (1,3) is located in the first quadrant.
3
8
IV
Quadrant I : (+, +) Quadrant II : (-, +) Quadrant III : (-, -) Quadrant IV : (+, -)
9
quadrent IV(4)
The point (2, 3) is located in the 1st quadrant
If A is in quadrant IV, then A/2 is in quadrant II. Yes, the fact than cos(A) is 0.1 means that A is in quadrant I or IV, but it really is not required in order to answer the question. It is superfluous.
The point (1,3) is located in the first quadrant.
6
(3, -3)
3
The quadrant where a point has a negative x coordinate and a negative y coordinate is located in quadrant 3.
8
IV
The point (8,0) is on an axis (abscissa axis or x-axis) and is therefore not in a quadrant.